lkml.org 
[lkml]   [2013]   [Dec]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 29/34] perf symbols: Set freed members to NULL in dso destructor
Date
From: Arnaldo Carvalho de Melo <acme@redhat.com>

To help in debugging use after free bugs.

Reported-by: Ingo Molnar <mingo@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-3ckwsob2g1q23s77nuhexrq7@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/util/dso.c | 14 ++++++++++++--
1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/tools/perf/util/dso.c b/tools/perf/util/dso.c
index 2c7e1899a735..19babb0d365d 100644
--- a/tools/perf/util/dso.c
+++ b/tools/perf/util/dso.c
@@ -475,13 +475,23 @@ void dso__delete(struct dso *dso)
int i;
for (i = 0; i < MAP__NR_TYPES; ++i)
symbols__delete(&dso->symbols[i]);
- if (dso->short_name_allocated)
+
+ if (dso->short_name_allocated) {
free((char *)dso->short_name);
- if (dso->long_name_allocated)
+ dso->short_name = NULL;
+ dso->short_name_allocated = false;
+ }
+
+ if (dso->long_name_allocated) {
free((char *)dso->long_name);
+ dso->long_name = NULL;
+ dso->long_name_allocated = false;
+ }
+
dso_cache__free(&dso->cache);
dso__free_a2l(dso);
free(dso->symsrc_filename);
+ dso->symsrc_filename = NULL;
free(dso);
}

--
1.8.1.4


\
 
 \ /
  Last update: 2013-12-11 03:21    [W:0.098 / U:0.484 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site